The invention discloses an infrared temperature measuring device for a gas-insulated metal-enclosed device, which can be mounted on a robot. A laser indicating module is connected with a calculation control unit through a transmission unit; an image recognition positioning module and an infrared temperature measuring module are connected with the calculation control unit; the image recognition positioning module is used to locate a target, and then the infrared temperature measurement module is activated to perform infrared temperature measurement on the target, and the measured temperature data is transmitted to the calculation control unit; and the calculation control unit performs phase calculation on the data through the temperature difference comparison method; the action indication signal formed is transmitted to a data storage transmission unit after operation processing, and the device performs the next action according to the feedback data signal. If the calculation control unit determines that the target device has a heat emitting defect, a sound and light alarm module is activated to issue an alarm, the laser indication module is started at the same time, and the coordinate position information is fed back to the transmission unit to indicate an exact location of an overheating detect point.